Liquid-fuel-feeding device



Jan. 3, 1928.

J, T. WEBBER LIQUID FUEL FEEDING DEVICE4 Filed March l5, 1927 S11/venta@ v Jmabbef;

15 mum number of parts which may be readily 30 designated b 35 in diameter and Patented Jan. 3, 1928.

UNITED STATES CORPORATION, F BALTlMORE, MARYLAND,

1,655,173 PATENT OFFICE.

LieUrnUnL-Fnnn-me DEVICE.

- l Application-Med March 15, 1927. Serial No. 175,802.

The present invention relates to improve' pump ceases or falls beloyv a predetermined amount.

The embodiments of the invention here1n after particularly described are relatively cheap of manufacture and include a miniienewed as desired. l l l In the accompanying drawin f Figure l is a vertical longitu inal section through a valve constructed in accordance with the present invention.

is a horizontal view, substan- Figure 2 tially on the line 2 2 of Figure 1.

Figure is a vert-ical longitudinal section of a slightly different embodiment of' the invention.

Figure 4c is a section on the line 4-4 of Figure 3.

Referring to the drawing in the several views of which corresponding part-s are like reference characters, the body of the improved device includes a c asing 1 which is provided at its lower end with an inlet or supply opening 2. As shown, the lower end of the casing is reduced somewhat provided with a suitable thread 3 by means of which the inlet port 2 may be connected with a suitable pipe or conduit leading from the outlet of a pump, not shown.

The casing is provided with a tubular boss which, as shown, extends, both inwardly and outwardly, laterally from the body' thereof, the inner end ofthe bore 5 of such member being directed upward and terminating'in a tapered valve seat in substantial alignment with the axis of the inlet port 2.

The outwardly projecting portion of said boss is provided with a thread 6 by means of which it may be connected to a suitable conduit leading to a burner, not shown.

An outlet 7 is provided in the side wall of the casing l at a point above the plane of the adjacent valve seat, and as shown, this communicates with the'interiorly threaded bore of a boss 8 `that is intended to receive one end of a by-pass conduit, by means of which any fuel not delivered to the burner, may be returned to a suitable container or storage tank as'is commonly done in ap aratus of the character for use in which t e present improvements are particularly designed.

The parts so far described can be formed as a single casting, thus reducing the cost of manufacture, and

and durable costruction.

As shown in Figure 1, the upper end of the casing 1 is closed by a plug 10 having threaded engagement with the side wall of the casing, and a cap 1l is fitted over this plug'and the adjusting screw -12 by means of which theforce of a main spring acting to normally maintain the valve closed, hereinafter more particularly described, may be varied, i j j A. passage or duct 13 formed in the side wall 'of the casing 1 connects the by-pass outlet 7 with upper-portionof the interior of the casing.

Referring particularly to Figures 1 and 2, the upper wall of the tubular member before referred to for supplying oil to the burner, extends entirely across the interior of the casing, and is provided with' a plurality of passages 15 through which liquid fuel sup plied by a pump to the inlet port 2 may pass. In this embodiment of the invention the upper inner end of the bore 5 extends slightly above the plane of the body of said member and about the adjacent valve seat is formed an exteriorly threaded boss 16. A cap 17 is engaged with the threads on this boss 16 and providing a very strong I through the side wall of such cap are formed e adjacent valve seat. The valve 20 extends outwardly throu h thel cap 17 and within the chamber in t e latter is provided with anannular flange 21. A coil sprin 23 interposed between said flange 2l and the end of the member in which the valve seat is formed, acts to raise said valve and permit the flow of liquid fuel from the inlet port 2 and passages 15, 1S into the bore v5 which, as before described, communicates i with the burner supply pipe.

In order that the valve may only be opened when there is a suliicient pressure of liquid 'uelor when the pump is acting, means are provided -for counteracting the ell'ect ot the coil'spring 23 and holding the valve closed.

UAS shown,sueh means include a piston 25 tit-ted within the casing 1 and having a dependin skirt 26 in which are formed apertures 2 adapted to communicate `with the by-pass outlet port 7, anda channel 30 coniiuunicatng therewith and formed in the inner face of the side wall ot the casing 1,

' when said pistou is raised sufficiently by the pressure of iiuid, beneath it.

A spring 4.0 seated in a. recess in the upper 5 end of the piston body and surmounted by a engages, acts to normally hold the arts in 'the positionlshown in Figure 'l in W piston bears .upon the upper end ot the valve 1 1-2()y andinaintains the saine, against disc 41 with which the adjusting screw 12 lich the the opposition of the relatively light spring 23, in

. "close contactwitli the valve seat. l

' It will be seen that when the pompoen- "lf'n'ected with the inlet port 2 isf operating and the pressure thereby created beneath the pisf fton is'suiiicient the latter will "be moved I upward, thus releasing the valve 20 from the 'i'.pressure of 'the spring 40.

As soonl as this pressure isremoved, the spring 23 will lift :communication between the casing l and the the valve from its sea-tand thereafter the liquidfuel will flow through the perforations .18 into the bore 5 and tlieretrom'tothe burner tube conduit. It .the amount of fluid 1. bing pumped at any time becomes excessive,

l piston 25 will beraised higher and the ports 27 'brought into communication with v the bypass outlet 7 so that the excess fluid will j 'by-pass to a suitable receptacle.

e conveyed through such outlet and As soon as the pump stops, from any cause,

y ,o'rtlie pressure created thereby falls below that of thespring 40, the valve 20 will be forced into close contact with its scat and burnereonduitpositively cut oil.

Inwtl'iei slightly different embodiment ot the invention illustrated in Figures f and .4, the outwardly projecting portion of. the boss in which the burner supply bore 5 is provided hns4 an enlarged interiorly thready ed recess adapted to be engaged with a suitablethread on the burner supply conduit. In this embodiment of the invention the valve is of a slifrhtly different formfrom. that previously f escribed. The body 51 of the Cpiston is provided with a reduced depen ing stem 52, the lower end of which is further reduced to provide a tapered portion 53 that conforms to and is adapted to litt closely against the' valve seat provided at the inner end of the bore 5.

As shown, the body of the piston 51 is 'of slightly less diameter than the casing l so that the by-'pass outlet 1l is constantly A in communication with the lower portion of :the chamber within the casing'.

y the piston is of cup-shape form and the free face of the head-61 at the lower lend of said rod is of such form that it makes an annular Contact with the bottom ofthe cavity so that there may be relative lateral movement between the rod and'piston body to insure that the valve will be accurately 'seated when desii'ed. v The vconnectionbetween the l.rod 50 and piston body lincludes a sleeve mit 62 which Ais engaged with' a "thread in' the inner a'cev`iof the wall of thecavity atdth'e upper end 'of the pston' bod'y,V andie'xteiids' over an 'annular iiange -64 on the head at the lower vend of the rod 60. '.The yoiitereiid of the piston rod is guided in 'aii'fadjustable plug 65 which engages the end wall of a A coil spring 67 arranged between washers 68, 69, respectively bearing upon the piston Vrod head 63 and resting on said'spring, acts to normally maintain the valve '53 in closed relation to the valve seat, but when the pressure of fluid-in the lower portion of the easving l'is suilieient to lift the piston 51 against the action of said spring, the valve .will be Sfr closure 66 for the outerend of the casing 1.

leo

raised from its seat and the fluid can flow outward to the burner through the bore 5 as previously described.

projecting end of the adjust-ing screw and piston stem guide 65.

It is believed 'that appreciated from the oregoino' description in connection with the drawing.'

A cap x0 is provided for enclosing the nor the operation andv ad-l i vvanta'ges of the invention will be readily It will be seen that the entire devicoifis of very simple construction including a ininimum of parts which are relatively cheap to l manufacture, andare so assembled that any one or more of them caribe readily removed and replaced if necessary.

Having thus described my invention, whatsY I claim is: v

u 1. A liquid fuel feeding device comprising a casing having an inlet port 'at its lower end, a tubular member extending laterally into the casing and having the inner end of v its bore directed upward, in substantial ali entwith the axis of the casing inlet, an forming a tapered valve seat, a byo the casing at of liquid in th 5 with f. tapered valve seat. a

pees outlet being provided in the side wall a point above the p pring within maintain the valve in to prevent the flow of iqud uel outward through the bore in said ss, and means controlled by the pressure e casing for lifting the valve from its seat.

2. A liquid fuel feeding' device comprising a casing having an inlet or supply port at its lower end, adapted to be connected h'a pump outlet, and provided above said inletwith an inwardly projecting, integral lar boss, the inner end of ti c bore in in substansai to prevent the How of rough the bore in said d means controlled by the pressure of the `casing for lifting the valve from its seat.

A3. A liquid fuel feeding device comprisf A.ing a casing having an inlet or supply port at its lower end, adapted to be connected a pump Outlet, and provided above said inlet with a tubular boss extending laterally into and exteriorly of the casing, the portion of said member extending outward from the casing being threaded for connecvtion with a suit-able burner conduit and the Y inner end of the bore in said boss being clizected upward in substantial alignment with he axis of the casing inlet and t second tubular boss being provided on the casing above the plane of said seat and having a thread whereby it may be connected with a by-pass conduit, e valve having a tapered lower end extending into and cooperating with said valve seat, a coiled spring within the casing acting to maintain the valve in contact with the seat forming. a b

to prevent the flow of liquid fuel outward throuwh the bore in said boss,and means contrdlled by the ressure of liquid in the casinor for lifting t ie valve from its seat.

liquid fuel feeding device comprising a casing having an inlet or supply port :it its lower end adapted to be connected with a pump outlet, and provided above said inlet with an inwardly projecting tubular member, the inner end of the bore in said member being directed upward in substantial alignment with the axis of the casing inlet and forming a tapered valve sent,

5. A liquid fuel feeding device compris ing a casing having an inlet or supply port' with a pump outlet, and provided above said h an inwardly projecting tubular member, the inner end of the bore in said member being directed upward vin substantial alignment with the axis of the casing inlet and forming a tapered valve seat, a iston within the casing having a valve adapted to cooperate with the valve JOSEPH T. WEBBER. 

